Powertrain, generic (extended)

P2065 Fuel Level Sensor B Circuit

Check engine lightOn
EmissionsRelevant
Drive cycleNot required
Limp modeNo

Sensor B is the second fuel level sender, used where one sender cannot cover the whole tank: the passive half of a saddle tank, a secondary tank on dual-tank trucks, or the secondary lever-type sender that Mercedes reads through its fuel pump module. Ford explains the saddle layout: a jet pump moves fuel to the active side, and both readings are averaged into one gauge value. P2065 is the general circuit code for this input, meaning an electrical fault not classified as low, high or intermittent. Ford's 2014 Boss 302S code list marks P2065 as a MIL code, and the 2024 Ford OBD summary uses P2065 as the base code for failure types such as -11, -12, -1C and -2A. CARB expects fuel level inputs to be monitored, because misfire and evaporative checks are suspended at low levels. Gauge and low fuel warning may mislead.

Likely causes

Loose or corroded connector at the second sender or pump module
Broken wire between sender and the module that reads it
Worn or failed sender card in the tank
Control module software that does not match the tank layout

Symptoms

  • Fuel gauge reads wrong, stuck or jumps
  • Low fuel warning comes on with a full tank or not at all
  • MIL on, evaporative monitor may not complete

Repair estimate

DifficultyMediumDIY possible
Parts and labour€40–450
Time0.5–3 h

Typical range across vehicles; the real cost depends on what the testing finds.

Parts involved

fuel level sensor bfuel tank

Related codes

P2066P2067P2068P2069P0460P25B1

References: performanceparts.ford.com, fordservicecontent.com, newtonnet.co.uk, static.nhtsa.gov.